Yes, when you have a crack in the skin it is most likely a fungal infection. It can come from as you mentioned public areas but these also include pedicure places. I recommend that you treat it with a topical anti-fungal cream like Lamsil once daily for 10 days. It can spread in moist environments to other people in the house, so, to prevent this, use a shoe and floor sanitizing spray.
Kathleen Neuhoff, DPM
No, you are not at risk of spreading tinea pedis infection to your husband or kids.
Jonathan M. Kletz, DPM
Geoffrey Bricker, DPM
few weeks of use. Good hygienic care of the feet to prevent exposure to environments conducive to this type of mold-like growth is critical specifically gym showers, pool decks and other areas of high traffic. It must be appreciated that there are other types of dermatitis that can produce similar findings of athlete's foot to include redness, scaling, itchiness and if your condition does not respond timely to traditional anti-fungal preparations it may be of benefit to have the skin eruption or rash evaluated by a medical provider. Skin scraping can be performed painlessly to determine if there are presence of fungal elements. If sterile you may be suffering from a noninfectious dermatitis that may better respond to other treatment such as topical steroids or lotions.